PLANOS NUTRICIONAIS PARA BOVINOS EM PASTAGEM E CONFINADOS / Nutritional plans for bovines kept in pastures and in a feed lot

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

This trail had the objective to evaluate the use of five supplements nutritional plan (P1, P2, P3, P4, and P5) utilizing five multiple mixture (M1, M2, M3, M4, and M5) for growing crossbreed Nelore steers grazing 16.8ha of Brachiaria brizanta, cv. Marandu pasture in the dry season of the year, and another five mixtures were used in the wet season. The 16.8ha pasture was kept without animals for about five months before starting the study and it presented an average of 10.134kg/ha of dry matter available at the beginning of the experiment (05-28-2004). The supplements were furnished daily and also prepared to self control consumption at the daily level of 1g/kg of body live weight. The experimental design was a randomized complete block and the results were statistically analyzed and the means separated by the f test at the probability level of 5%. Whenever necessary, the means for the treatments were compared by the Scott â Knott test at the 5% level of probability. It was used 25 steers weighing 181kg at the beginning of the experiment. The statistical analysis for live weight daily gain of the total period (dry and wet season) were not different and the DLWG were 0.545; 0.545; 0.553; 0.558; and 0.542kg for the treatments P1, P2, P3, P4, and P5, respectively. In the feed lot trial the steers received silage made of sugar cane, elephant grass plus 1% of urea and ammonia sulphate. As a concentrate it was used a mixture of ground corn, soy bean meal, urea plus ammonia sulphate, calcite lime, minerals, and ionophorus. The treatments studied were: T1 â silage plus 1g of the concentrate per kg of live weight; T2 - silage plus 3g of the concentrate per kg of live weight; T3 - silage plus 5g of the concentrate per kg of live weight; T4 - silage plus 7g of the concentrate per kg of live weight; and T5 - silage plus 9g of the concentrate per kg of live weight. The statistical analysis for DLWG showed significance and followed a straight line (p<0.05) and the DLW were 0.824; 1.053; 1.136; 1.282 ; and 1.289kg for the treatments T1, T2, T3, T4, and T5, respectively. It also showed that there is a relationship between daily gain and the amount of concentrate given to the cattle.

ASSUNTO(S)

suplementos ganho de peso zootecnia novilhos mestiÃos confinamento

ACESSO AO ARTIGO

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